What is the difference between Claude Sonnet 4 and GPT-5.2?

Claude Sonnet 4 is developed by Anthropic while GPT-5.2 is developed by OpenAI. Claude Sonnet 4 has a 200K token context window vs GPT-5.2's 400K. You can compare their actual outputs across 53 challenges on Rival to see how they differ in practice.

Which is better, Claude Sonnet 4 or GPT-5.2?

It depends on your use case. Claude Sonnet 4 and GPT-5.2 each have strengths in different areas. Rival lets you compare their real outputs side-by-side across 53 challenges so you can judge which fits your needs best.

How much does Claude Sonnet 4 cost compared to GPT-5.2?

Claude Sonnet 4 costs $3/M input tokens and GPT-5.2 costs $1.75/M input tokens. GPT-5.2 is $1.25/M cheaper per input. Check their side-by-side outputs on Rival to see if the price difference is justified by quality.

How can I compare Claude Sonnet 4 and GPT-5.2 on Rival?

This page shows a side-by-side comparison of Claude Sonnet 4 and GPT-5.2 across shared challenges. You can vote on which model produced the better output in a blind duel. Browsing and voting are free. No account is needed to look; signing in only saves your votes and likes.

Updated Dec 2025

Claude Sonnet 4vsGPT-5.2

GPT-5.2 is cheaper than Claude Sonnet 4 at $1.75/M vs $3/M input tokens.

Claude Sonnet 4 and GPT-5.2 compared across 53 shared prompts
Spec	Claude Sonnet 4	GPT-5.2
Input price	$3/M tokens	$1.75/M tokens
Output price	$15/M tokens	$14/M tokens
Context window	200K tokens	400K tokens
Weights	Closed	Closed
Free API (OpenRouter)	No	No
Released	May 2025	Dec 2025
SWE-bench Verified	72.7%	80.0%